EN 12814-3:2014
(Main)Testing of welded joints in thermoplastics semi-finished products - Part 3: Tensile creep test
Testing of welded joints in thermoplastics semi-finished products - Part 3: Tensile creep test
This European Standard specifies the dimensions, the method of sampling and the preparation of the test specimens, and the conditions for performing the tensile creep test perpendicular to the weld in order to determine the long-term tensile welding factor.
A tensile creep test may be used in conjunction with other tests (e.g. bend test, tensile test, macrographic examination,...) to assess the performance of welded assemblies, made from thermoplastics materials.
The test is applicable to welded assemblies made from thermoplastics materials filled or unfilled such as tubes and fittings, sheets, plates and profiles, but not reinforced, irrespective of the welding process used.
Prüfen von Schweißverbindungen aus thermoplastischen Kunststoffen - Teil 3: Zeitstand-Zugversuch
Diese Europäische Norm legt Maße, Probenahmeverfahren, Probenvorbereitung sowie Durch¬führungs-bedingungen für einen Zeitstand-Zugversuch rechtwinklig zur Schweißnaht fest, bei dem der Zeitstandzug-Schweißfaktor bestimmt wird.
Ein Zeitstand-Zugversuch kann zusammen mit anderen Prüfungen (z. B. Biegeversuch, Zugversuch, makrographische Untersuchung) angewendet werden, um das Betriebsverhalten von Schweißverbindungen aus thermoplastischen Kunststoffen zu beurteilen.
Der Zeitstand-Zugversuch ist auf Schweißverbindungen aus gefüllten oder ungefüllten, jedoch nicht aus verstärkten thermoplastischen Kunststoffen unabhängig vom angewendeten Schweißverfahren anwendbar, z. B. auf Rohre, Fittings, Bahnen und Platten sowie Profile.
Essais des assemblages soudés sur produits semi-finis en thermoplastiques - Partie 3: Essai de fluage en traction
La présente Norme européenne spécifie les dimensions, la méthode d'échantillonnage et la préparation des éprouvettes, ainsi que les conditions d'exécution de l'essai de fluage en traction perpendiculairement à la soudure, afin de déterminer le coefficient de soudure en traction à long terme.
Un essai de fluage en traction peut être utilisé conjointement avec d'autres essais (par exemple : essai de pliage, essai de traction, examen macrographique, ...) pour évaluer les performances des assemblages soudés en thermoplastiques.
Cet essai est applicable aux assemblages soudés constitués de matières thermoplastiques chargées ou non chargées, telles que tubes et raccords, feuilles, plaques et profilés, mais non renforcées, indépendamment du procédé de soudage utilisé.
Preskus zvarjenih spojev plastomernih polizdelkov - 3. del: Preskus lezenja pri natezni obremenitvi
Standard EN 12814-3 določa dimenzije, metodo vzorčenja, pripravo preskusnih vzorcev in pogoje za izvedbo preskusa lezenja pri natezni obremenitvi, pravokotno na zvar, s katerim se določi dolgoročni natezni faktor zvara. Preskus lezenja pri natezni obremenitvi se lahko uporabi skupaj z drugimi preskusi (npr. preskus upogibanja, natezni preskus, makrografski pregled ...) za oceno zmogljivosti varjenih sestavov iz termoplastičnih materialov. Preskus se uporablja za varjene sestave iz polnjenih ali nepolnjenih termoplastičnih materialov, kot so cevi in spojniki, ponjave, plošče, in profili, ki niso ojačani – ne glede na uporabljeni postopek varjenja.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Preskus zvarjenih spojev plastomernih polizdelkov - 3. del: Preskus lezenja pri natezni obremenitviPrüfen von Schweißverbindungen aus thermoplastischen Kunststoffen - Teil 3: Zeitstand-ZugversuchEssais des assemblages soudés sur produits semi-finis en thermoplastiques - Partie 3: Essai de fluage en tractionTesting of welded joints in thermoplastics semi-finished products - Part 3: Tensile creep test25.160.40Varjeni spoji in variWelded jointsICS:Ta slovenski standard je istoveten z:EN 12814-3:2014SIST EN 12814-3:2014en,fr,de01-maj-2014SIST EN 12814-3:2014SLOVENSKI
STANDARDSIST EN 12814-3:2000/A1:2005SIST EN 12814-3:20001DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12814-3
February 2014 ICS 25.160.40 Supersedes EN 12814-3:2000English Version
Testing of welded joints in thermoplastics semi-finished products - Part 3: Tensile creep test
Essais des assemblages soudés sur produits semi-finis en thermoplastiques - Partie 3: Essai de fluage en traction
Prüfen von Schweißverbindungen aus thermoplastischen Kunststoffen - Teil 3: Zeitstand-Zugversuch This European Standard was approved by CEN on 30 November 2013.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
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B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12814-3:2014 ESIST EN 12814-3:2014
Page Foreword .3 Introduction .4 1 Scope .5 2 Normative references .5 3 Terms and definitions .5 4 Symbols and designations .5 5 Principle of the test.6 6 Sampling procedures .7 7 Dimensions of test specimens .7 8 Cutting and preparation of test specimens .9 9 Mechanical testing . 10 10 Test equipment . 10 11 Determination of the long-term welding factor . 11 12 Test report . 13 Annex A (informative)
Resistance to slow crack growth . 15 Annex B (informative)
Whole pipe tensile creep rupture test . 18 Annex C (informative)
Minimum creep rupture time of the parent material (ttm) for applicability of the long-term welding factor . 21 Annex D (informative)
Testing of socket joints . 22 Bibliography . 25
Fs Value of the force applied to the welded test specimen calculated from the chosen value of 1s N Ft Value of the force applied to the unwelded test specimen calculated from the chosen value of 1t N L Total length of the test specimen mm Lj Minimum distance between the clamping jaws mm L0 Calibrated and parallel length of the test specimen mm Lw a Maximum width of the weld bead of the test specimen mm r Radius of shoulder of the test specimen mm ttm Minimum failure time h 1s Value of stress of the welded test specimens used in the calculation of fl N/mm2 1t Reference stress. Value of stress of the unwelded test specimens, used in the calculation of fl N/mm2 a For extrusion and hot gas welds only.
5 Principle of the test The test involves subjecting a test specimen to a constant load until fracture occurs. The time to fracture is measured and recorded. NOTE An alternative test using a whole pipe welded sample rather that a test specimen cut form the weld is given in Annex B. SIST EN 12814-3:2014
Key Lj
= L0 + (2xb) Figure 1 — Type 1 test specimen for flat and tubular assemblies
Figure 2 — Type 2 test specimen for flat and tubular assemblies
an ≤ 10 15 120 ≥ 170 10 < an ≤ 20 30 120 ≥ 170 an > 20 1,5 x an 3 x an + Lw with 120 min ≥ L0 + 80
Table 3 — Dimensions of type 2 test specimens Dimensions in millimetres Dn or an b min. b1 L0 L r 20 ≤ Dn < 50 10nnDa+ b + 10 Lw + 60 ≥ 120 60 50 ≤ Dn < 100 10nnDa+ b + 10 Lw + 60 ≥ 170 60 Dn ≥ 100 or flat assemblies:
an ≤ 10 10 20 115 ≥ 170 60 10 < a
...
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